Separator-trap.



E. C. KELLY, JR

SEFARATOR TRAP.

APPLICATION FlLED SEPTfl 1, 1914.

g gg gq Patented Nov. 2, 1915.

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UNITED 1 Pannier QF EDWARD o. KELLY, an, on nos'rou, iaasssc'nnsnrrs, assfenon T0 KELLY sere- RA'I'OR COMPANY, on BOSTGN, riiassacnusnr rs, a soars-narrow or Massachu- SE'ITS.

SEPARATOR=TRAR Application filed September 11, 151

of lVIirssa-husetts, have invented new and useful Improvements in Separator-Traps,

, of which the following is a specification.

My invention relates to the separation of oils, grease, or other generally similar substances from the waste water of kitchens, laundries, garages and the like, and consists in an assemblage of related structural factorsby which the proper separation of those materials such as oils or grease, which should be preventedfrom passing into drains or sewers, is effectively accomplished, and the removal of the grease, etc, easily effected.

In the drawings hereto annexed which illustrate my invention, Figure 1 shows a grease trap in vertical section; and Fig. 2 shows a portion of the said grease trap in horizontal section, illustrating the arrangement of one of the displacement and agitating pipes hereinafter described.

The trap illustrated in the drawings com Specification of Letters E'ateni Serial No. SGLlfi-l.

point higher than the upper part 'of the curve or elbow of which the pipe B formsa part. 'i he level of water, therefore, in the pipe. E will stand normally at such apoint as L, which being above the highest point of the interior of the trap chamber keeps the liquid in the interior of the chamber always under a moderate head or pressure.

When mixed liquids descend into the trap through the pipes D and D, their entrance causes a displacement of some of the water standing in the pipe E, the surplus being drained off to the sewer. The lower end of the pipe E being at a considerably lower leyel in the trap chamber of the pipe D and these two pipes being 'lieferably also situated at opposite sides of the trap chamber, the influx of mixed liquids through the pipe D, even though voluminous and somewhat violent, will not be likely to carry anyoil', grease, or any ot i'eiundesirable matter to the pipe E, but these lighter materials will have ample oppolrtunity to rise in the trap chamber and at u prises a trap chamber A which is for the already in the top of the chamber under its communication from the interior of the trap chamber to the tap pipe 13. This pipe is controlled bythe closure at B, the latterbeingby preference a simple valve such as a gate valve, The Waste, consisting of mixed liquids, most ofwhich Will usually be water,

Y enters the trap chamber;thr0ugh the inlet D,

which communicates With the Waste pipe I). The lower end of the inlet!) extends down- Ward a short distance into the trap chamber A and preferably'to a pointlow enough in said chamberinormally to prevent accumulationof oils or grease from reaching a level as low as the inner. end of the inlet-pipe D.

Theoutlet pipe for water is at E andex-f tends upward to a level above the top oft-he trap chamber A, that is to say,exte nds to a;

conical head 'A'.

So long as the closure l3 remains closed,

which its normal position, the circumstance that all the liquids in the trap cham-. v 1 1 s 1 oer a re uncle] tne nead produced by the high lev L keeps the topof the chamber full and prevents agitation due to influx of mixed liquids through the pipe D from materially disturbing the. quiet of the lower surface of the body of oil or grease, Whenever it is desired to remove the accumulations from'the top of the trap chamber, the closure B may b'efopened, and then the head, due to the level of water in thepipe E, will start the flow ofgrease, etc, through the pipe B. This pipe will presently act as a siphon and will draw the grease from the top of the pipe Patented Nov. 2, H315,

than the lower end to theaccumuiation of similar materials I This may be done by Simply y depletionofthe pipe D of its liquid Y pecially provided for the introduction of water, steam or air irito the trap chamber; such auxiliary supply pipes are shown at F, and these preferably are so disposed that they lie close to the sides of the trap chamber A, as illustrated in Fig. 2. Each pipe F is opened at its extreme inner'end and is also provided with induction pipes F so that when a liquid under pressure is introduced through either of the plpes F the ejector effect of the current 1n the pipe F'will .cause the liquid in the trap chamber to enter the induction pipe F, thus setting up a stirring and circulating movement in the liquid. This treatment 01 thefcontents of the trap chamber will be found effective to break up anyjlotted or filmy masses, such as sometimes form where solid matter and grease are present in waste water and when. separated from the grease the solid portions of these masses settle to the bottom of the trap from which they can be periodically removed by means of the gate valves at C, while the oil or greasy constituents rise and join the trap grease, etc., at the top of the trap chamber. The pipe F may be connected with a water supply or a supply ofcompresed air or with a steam supply, or may be so arranged as to communicate at'will with a supply of water, steam or air. Vl l'ien connected with a water supply the pipes F may be used to introduce displacement water into the trap chamber for the purpose of removing all of the oil or grease which has collected in the top of the chamber by displacing it and causing it to run out through the pipe B. past the closure 13* and into whatever receptacle may be provided for the purpose. The pipe F is supplied with a control valve, as shown, adjacent to the trap chamber, so that the trap may be discharged of oil or grease conven iently.

The type of grease trap above described is intended particularly for situations in which the mixed liquids which enter the trap come from a high level and therefr re enter the trap chamber with considerable force. The fact that the top of the trap chamber is normally closed prevents anysurging of greasy matters out of the trap. no matter how violent and copious may be the introduction of mixed liquid into the trap itself. 1 4

What I claim and desirz to secure by Letters Patent is:

1. A. trap for grease and the like, the combination of a trap chamber, an inlet for mixed liquids thereto and an outlet therefrom for water waste, the water waste outlet extendingto a level above that of the trap chamber, an outlet from the top of the chamber for grease and the like, a controlling closure for the said last named outlet, and additional means with control adjacent to the trap chamber for introducing displacing chamber.

2. A trap for grease and the like, the combination of a trap chamber, an inlet for mixed liquids thereto and an outlet therefrom for water waste, the water wasteoutlet extending to a level above that of the trap fluid to the interior of the trap chamber, an outlet from the top of the chamcombination of a trap chamber, an inlet for mixed liquids thereto and-an outlet therefrom for water waste, the water waste outlet extending to a level above that of the trap chamber, a siphon outlet from the top of the chamber for grease and the like, a

controlling closure for the siphon outlet, and.

additional means withcontrol adjacent to the trap chamber for introducing displacing fluid to the interior of the trap chamber.

l. In a trap for grease and the like, the combination of a trap. chamber, an inlet thereto for mixed liquids extending through the top of the chamber, an outlet from the trap chamber extending from a low point therein upward to a level above the top of the chamber, an outlet from the upper part of the chamber for grease and the like, a control: .ig clo ure in said lastnaine'd outlet, and additional. meanswith control'adjacent to the trap chamber for introducing displacing fluid to the interior of the trap chamber.

Signed by me at Boston, Massachusetts, this eighth day of September, 1914.

EDlVARD C. KELLY, JR. Vitnesses:

CHARLES D. lVoonnnnnr, FLORENCE A. COLLINS., 

